Comment by wubrr

> Very few system fonts are any good.

An obviously false statement which you can't possibly back up.

> Would you use Arial instead of Helvetica Neue? I certainly wouldn't. Put two posters side-by-side and you'd notice the Helvetica one as looking more professional, even without any design background.

First of all that's just completely your own subjective opinion. Second, there are many other free sans-serif fonts out there to choose from (examples[1]).

> Good design creates a reaction, such as causing you to buy something or interacting more with something or whatever

'Design' can encompass many things, but can you show me some data that backs up your claim that slight differences in fonts will make a difference in product quality/performance/revenue/etc? Because I have seen a loooot of data that says it's almost always completely irrelevant.

[1] https://fonts.google.com/?categoryFilters=Sans+Serif:%2FSans...